We tried to study the relation between the histopathology findings, in terms of type of abnormality (hyperplasia vs. adenoma), physical characteristics of the hypersecreting gland, including the weight of the gland, as well as the relation to the parathyroid hormone obtained preoperatively, and the overall results of the successful localization of the parathyroid gland intraoperatively in a UNE and parathyroidectomy. Here, PTH is linked to adenoma.